Welcome to issue 243 of the HWN, an issue covering crowd-sourced bits of information about Haskell from around the web. This issue covers the week of August 26 to September 01, 2012. Quotes of the Week * companion_cube: "I don't understand this article at all" edwardk: "Well, when you finish reading it, here's a follow-up article" Top Reddit Stories * Parsing with Haskell and Attoparsec Domain: newartisans.com, Score: 64, Comments: 8 On Reddit: [1] http://goo.gl/rrlQG Original: [2] http://goo.gl/aHlTJ * FRP - Release of reactive-banana-0.7. Finally features dynamic event switching! Domain: apfelmus.nfshost.com, Score: 48, Comments: 21 On Reddit: [3] http://goo.gl/5QnBl Original: [4] http://goo.gl/8dnLg * Combinatorrent - Writing Haskell Code for Fun and Profit [InfoQ] Domain: infoq.com, Score: 46, Comments: 14 On Reddit: [5] http://goo.gl/FE4OF Original: [6] http://goo.gl/feU7U * Putting it all together -- Example project that pulls together Snap, Blaze, OpenId, IxSet, AcidState, and Sessions. Domain: self.haskell, Score: 34, Comments: 3 On Reddit: [7] http://goo.gl/huFaI Original: [8] http://goo.gl/huFaI * Invert the Inversion of Control Domain: thev.net, Score: 32, Comments: 30 On Reddit: [9] http://goo.gl/1uO5a Original: [10] http://goo.gl/89UnF * A follow up on my initial experience and why there's still something immensely attractive about Haskell Domain: binarysculpting.com, Score: 27, Comments: 19 On Reddit: [11] http://goo.gl/3RLNO Original: [12] http://goo.gl/81YF2 * Haskim -- a convenient Haskell VIM distribution Domain: github.com, Score: 25, Comments: 19 On Reddit: [13] http://goo.gl/9sJ3O Original: [14] http://goo.gl/Wq0Rq * Introducing Perdure: persistence for acyclic immutable data Domain: hackage.haskell.org, Score: 23, Comments: 12 On Reddit: [15] http://goo.gl/ACWDi Original: [16] http://goo.gl/CSi57 * Existential types and data abstraction Domain: iveselov.info, Score: 22, Comments: On Reddit: [17] http://goo.gl/K6JGl Original: [18] http://goo.gl/GBYlW * I just realized that running monads is applying a left monad action Domain: self.haskell, Score: 20, Comments: 63 On Reddit: [19] http://goo.gl/Geus4 Original: [20] http://goo.gl/Geus4 Top StackOverflow Questions * How can I recover sharing in a GADT? votes: 14, answers: 2 Read on SO: [21] http://goo.gl/I3cuW * Constructing efficient monad instances on `Set` (and other containers with constraints) using the continuation monad votes: 13, answers: 2 Read on SO: [22] http://goo.gl/Ys4Uy * Numbers as multiplicative functions (weird but entertaining) votes: 12, answers: 1 Read on SO: [23] http://goo.gl/yN8KN * Game server in Haskell votes: 10, answers: 3 Read on SO: [24] http://goo.gl/QV9de * Why doesn't sortBy take (a -> a -> Bool)? votes: 10, answers: 5 Read on SO: [25] http://goo.gl/Y7EzD * Default type instances referring to each other votes: 9, answers: 1 Read on SO: [26] http://goo.gl/6cUG7 * Applying a fixed-length-vector-function to the inital part of a longer fixed-length-vector votes: 9, answers: 2 Read on SO: [27] http://goo.gl/03KcE * Haskell: example of function of type a -> a, besides the identity votes: 9, answers: 5 Read on SO: [28] http://goo.gl/q2UDW * Stack overflow when using Haskell sort function votes: 8, answers: 2 Read on SO: [29] http://goo.gl/D31Ku * How to navigate up inside a HUET Zipper votes: 7, answers: 2 Read on SO: [30] http://goo.gl/X7dE3 * Haskell : reference to previously updated elements of list within the update function votes: 7, answers: 6 Read on SO: [31] http://goo.gl/0yRIo * Is there any way to make parsec report “shift-reduce” conflicts? votes: 7, answers: 1 Read on SO: [32] http://goo.gl/LQeDG * Haskell: how to write a monadic variadic function, with parameters using the monadic context votes: 7, answers: 1 Read on SO: [33] http://goo.gl/ThniY * Haskell parMap and parallelism votes: 7, answers: 1 Read on SO: [34] http://goo.gl/3qQHu Until next time, Daniel Santa Cruz References 1. http://newartisans.com/2012/08/parsing-with-haskell-and-attoparsec/ 2. http://www.reddit.com/r/haskell/comments/z2lir/parsing_with_haskell_and_atto... 3. http://apfelmus.nfshost.com/blog/2012/08/26-frp-banana-0-7.html 4. http://www.reddit.com/r/haskell/comments/yv6ku/frp_release_of_reactivebanana... 5. http://www.infoq.com/presentations/Combinatorrent-Haskell-casestudy 6. http://www.reddit.com/r/haskell/comments/yzdyr/combinatorrent_writing_haskel... 7. http://www.reddit.com/r/haskell/comments/z4iay/putting_it_all_together_examp... 8. http://www.reddit.com/r/haskell/comments/z4iay/putting_it_all_together_examp... 9. http://www.thev.net/PaulLiu/invert-inversion.html 10. http://www.reddit.com/r/haskell/comments/z4inb/invert_the_inversion_of_contr... 11. http://binarysculpting.com/2012/09/01/theres-something-about-haskell/ 12. http://www.reddit.com/r/haskell/comments/z6idz/a_follow_up_on_my_initial_exp... 13. https://github.com/jejansse/haskim 14. http://www.reddit.com/r/haskell/comments/z3orc/haskim_a_convenient_haskell_v... 15. http://hackage.haskell.org/package/perdure-0.1.2 16. http://www.reddit.com/r/haskell/comments/z2sc6/introducing_perdure_persisten... 17. http://iveselov.info/posts/2012-08-30-existential-types.html 18. http://www.reddit.com/r/haskell/comments/z1ojj/existential_types_and_data_ab... 19. http://www.reddit.com/r/haskell/comments/ytovd/i_just_realized_that_running_... 20. http://www.reddit.com/r/haskell/comments/ytovd/i_just_realized_that_running_... 21. http://stackoverflow.com/questions/12230088/how-can-i-recover-sharing-in-a-g... 22. http://stackoverflow.com/questions/12183656/constructing-efficient-monad-ins... 23. http://stackoverflow.com/questions/12133932/numbers-as-multiplicative-functi... 24. http://stackoverflow.com/questions/12134097/game-server-in-haskell 25. http://stackoverflow.com/questions/12152561/why-doesnt-sortby-take-a-a-bool 26. http://stackoverflow.com/questions/12199324/default-type-instances-referring... 27. http://stackoverflow.com/questions/12221080/applying-a-fixed-length-vector-f... 28. http://stackoverflow.com/questions/12230820/haskell-example-of-function-of-t... 29. http://stackoverflow.com/questions/12203380/stack-overflow-when-using-haskel... 30. http://stackoverflow.com/questions/12129300/how-to-navigate-up-inside-a-huet... 31. http://stackoverflow.com/questions/12144973/haskell-reference-to-previously-... 32. http://stackoverflow.com/questions/12170780/is-there-any-way-to-make-parsec-... 33. http://stackoverflow.com/questions/12175912/haskell-how-to-write-a-monadic-v... 34. http://stackoverflow.com/questions/12224842/haskell-parmap-and-parallelism